Master Yi build Question.

Master Yi build Question.

My friend and I both play master yi and we've both got pretty good win records, but we really disagree with our builds. The main bit is that I try to always build a Frozen heart fairly early and he thinks that it's rubbish and a waste of gold. According to him I don't need any defensive items for a good Yi and i should go more DPS? Thoughts? Opinions?

My reason for the Heart is because I backdoor turrets alot, which usually gets me swarmed when the other team retaliates. Plus the 400 mana and the blue buff let me alpha strike like mad. The rest of my build is usually(but not always) 2 phantom dancers, Infinity Edge, and Spirit of the Ancient Golem. I've always figured that the phantom dancers+ Infinity were pretty much over kill on AP

My reason for the Heart is because I backdoor turrets alot, which usually gets me swarmed when the other team retaliates. Plus the 400 mana and the blue buff let me alpha strike like mad. The rest of my build is usually(but not always) 2 phantom dancers, Infinity Edge, and Spirit of the Ancient Golem. I've always figured that the phantom dancers+ Infinity were pretty much over kill on AP